It's Day 0 of E3 2015. This is the time when all the giants of popular gaming make their big announcements, competing for your attention and future gaming dollars. Today is also a big day for YouTube, which doesn't make games, but will soon be introducing a dedicated YouTube Gaming service. It too will be competing for the attention of millions.

The goals of YouTube Gaming are as grand as YouTube itself. Google wants its new website and app to become "the biggest community of gamers on the web" and the destination for live-streamed game video, whether it comes from professional tournaments or amateurs playing just for fun. If that sounds exactly like Twitch, that's because it is. Having lost out to Amazon in the pursuit to acquire Twitch last summer, Google has spent the past year building up its own alternative, and that's what we have to look forward to in the coming weeks.

YouTube is well-positioned to compete with Twitch, since most streamers upload the VODs to YouTube anyway. Why not have it all in one place?

In any event, yet another case of competition breeding product improvements.